Porto president Pinto da Costa has told Chelsea they must cough up big for defender Bruno Alves.

The Portugal international's father, Washington, has revealed that the defender is keen to move on this summer and is being chased by Chelsea and Barcelona.

Da Costa said: "He has a clause of £27 million. Could we convert this to a smaller amount? If he has a clause of £27 million agreed by Porto, the agent and the player, because that is the value of him."